Which of the following has the lowest heat of hydrogenation per mole?

Addition of $HCl$ does not obey Anti-Markovnikov's rule because

Which of the following has the maximum heat of hydrogenation?

The reaction of propene with $HOCl$ proceeds via the addition of which of the following in the first step?

Consider compounds $A$, $B$ and $C$ with following structural formulae: $A = CH_{3} - CH_{2} - CH_{2} - CH_{2} - CH_{2} - OH$, $B = CH_{2} = CH - CH_{2} - CH_{2} - CH_{3}$, $C = HO - CH_{2} - CH_{2} - CH(OH) - CH_{3}$. For the conversion of $B$ from $A$, reagent $(D)$ required is . . . . . . and structural formula of product $(E)$ obtained when $C$ undergoes same reaction using excess reagent $(D)$ is . . . . . . .

$Propanal$ and $pentan-3-one$ are ozonolysis products of: